diff --git a/core/ASN_CharacterString.cc b/core/ASN_CharacterString.cc
index c1c8a23bbc9c5800e363f006e97ea60f567cd8c6..b81fad2777d13481ff0056c3bb617323ace6a854 100644
--- a/core/ASN_CharacterString.cc
+++ b/core/ASN_CharacterString.cc
@@ -597,6 +597,7 @@ Module_Param* CHARACTER_STRING_identification_template::get_param(Module_Param_N
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported value of type CHARACTER STRING.identification.");
     break;
   }
   if (is_ifpresent) {
@@ -1933,6 +1934,7 @@ Module_Param* CHARACTER_STRING_identification_syntaxes_template::get_param(Modul
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type CHARACTER STRING.identification.syntaxes.");
     break;
   }
   if (is_ifpresent) {
@@ -2666,6 +2668,7 @@ Module_Param* CHARACTER_STRING_identification_context__negotiation_template::get
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type CHARACTER STRING.identification.context-negotiation.");
     break;
   }
   if (is_ifpresent) {
@@ -3546,6 +3549,7 @@ Module_Param* CHARACTER_STRING_template::get_param(Module_Param_Name& param_name
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type CHARACTER STRING.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/ASN_EmbeddedPDV.cc b/core/ASN_EmbeddedPDV.cc
index a5a89e4503089c1967ae683307452238f94d1a2d..9965e78eb50c3743f31dbb4d98e24136abb1fba3 100644
--- a/core/ASN_EmbeddedPDV.cc
+++ b/core/ASN_EmbeddedPDV.cc
@@ -584,6 +584,7 @@ Module_Param* EMBEDDED_PDV_identification_template::get_param(Module_Param_Name&
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported value of type EMBEDDED PDV.identification.");
     break;
   }
   if (is_ifpresent) {
@@ -1937,6 +1938,7 @@ Module_Param* EMBEDDED_PDV_identification_syntaxes_template::get_param(Module_Pa
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type EMBEDDED PDV.identification.syntaxes.");
     break;
   }
   if (is_ifpresent) {
@@ -2678,6 +2680,7 @@ Module_Param* EMBEDDED_PDV_identification_context__negotiation_template::get_par
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type EMBEDDED PDV.identification.context-negotiation.");
     break;
   }
   if (is_ifpresent) {
@@ -3563,6 +3566,7 @@ Module_Param* EMBEDDED_PDV_template::get_param(Module_Param_Name& param_name) co
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type EMBEDDED PDV.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/ASN_External.cc b/core/ASN_External.cc
index ab94f3288ac3143cc228923036649460c5b6f89b..580a163b8aea46e70d3b4d9687d788fe33731c4d 100644
--- a/core/ASN_External.cc
+++ b/core/ASN_External.cc
@@ -1214,6 +1214,7 @@ Module_Param* EXTERNAL_identification_template::get_param(Module_Param_Name& par
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported value of type EXTERNAL.identification.");
     break;
   }
   if (is_ifpresent) {
@@ -2239,6 +2240,7 @@ Module_Param* EXTERNAL_identification_syntaxes_template::get_param(Module_Param_
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type EXTERNAL.identification.syntaxtes .");
     break;
   }
   if (is_ifpresent) {
@@ -2885,6 +2887,7 @@ Module_Param* EXTERNAL_identification_context__negotiation_template::get_param(M
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type EXTERNAL.identification.context-negotiation.");
     break;
   }
   if (is_ifpresent) {
@@ -3652,6 +3655,7 @@ Module_Param* EXTERNAL_template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type EXTERNAL.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/ASN_Null.cc b/core/ASN_Null.cc
index f00bff8a22f2dade914cbb74d34b120eae3d70c4..a1122fa2a1e233a2456838daec224f199067f3db 100644
--- a/core/ASN_Null.cc
+++ b/core/ASN_Null.cc
@@ -624,6 +624,7 @@ Module_Param* ASN_NULL_template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported ASN.1 NULL template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Bitstring.cc b/core/Bitstring.cc
index d2d2637d33f3173cbd164ec3208633e83d08f607..953a108d523f21793cfc9f2d13d6d676f2d459b3 100644
--- a/core/Bitstring.cc
+++ b/core/Bitstring.cc
@@ -2023,9 +2023,10 @@ Module_Param* BITSTRING_template::get_param(Module_Param_Name& param_name) const
     mp = new Module_Param_Bitstring_Template(pattern_value->n_elements, val_cpy);
     break; }
   case DECODE_MATCH:
-    mp->error("Referencing a decoded content matching template is not supported.");
+    TTCN_error("Referencing a decoded content matching template is not supported.");
     break;
   default:
+    TTCN_error("Referencing an uninitialized/unsupported bitstring template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Boolean.cc b/core/Boolean.cc
index e0d3fe21562ed8a7e2f950ff4d5506698f919542..13dca0093bfed5ca65c04adc8bc97e2abc91e73e 100644
--- a/core/Boolean.cc
+++ b/core/Boolean.cc
@@ -1114,6 +1114,7 @@ Module_Param* BOOLEAN_template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported boolean template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Charstring.cc b/core/Charstring.cc
index 52e74544c3e0445324a74fbe1fb58e1e277483e3..eeb4bce4f340e3b5074d69ad052c5165a243a4dd 100644
--- a/core/Charstring.cc
+++ b/core/Charstring.cc
@@ -2838,9 +2838,10 @@ Module_Param* CHARSTRING_template::get_param(Module_Param_Name& param_name) cons
     mp = new Module_Param_Pattern(mcopystr(single_value), pattern_value.nocase);
     break;
   case DECODE_MATCH:
-    mp->error("Referencing a decoded content matching template is not supported.");
+    TTCN_error("Referencing a decoded content matching template is not supported.");
     break;
   default:
+    TTCN_error("Referencing an uninitialized/unsupported charstring template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Component.cc b/core/Component.cc
index adc890f6bd1dba581144507cbc164aecdb0b8012..c634058de5bffad67e2a5347d67560225fdc1db0 100644
--- a/core/Component.cc
+++ b/core/Component.cc
@@ -746,6 +746,7 @@ Module_Param* COMPONENT_template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported component reference template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Float.cc b/core/Float.cc
index fe599dc9515e3c05b64310b3394dfd0e82430705..9aaa02768da58c5587e0f47794cbf0562cdbc69a 100644
--- a/core/Float.cc
+++ b/core/Float.cc
@@ -1647,6 +1647,7 @@ Module_Param* FLOAT_template::get_param(Module_Param_Name& param_name) const
       value_range.max_value, value_range.max_is_present, value_range.min_is_exclusive, value_range.max_is_exclusive);
     break;
   default:
+    TTCN_error("Referencing an uninitialized/unsupported float template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Hexstring.cc b/core/Hexstring.cc
index ef55ca90b506a2df58decbd2c8859b5a3ffac9f6..f4e5208694040d272f3b406c240c3bd2091fa7b5 100644
--- a/core/Hexstring.cc
+++ b/core/Hexstring.cc
@@ -1917,9 +1917,10 @@ Module_Param* HEXSTRING_template::get_param(Module_Param_Name& param_name) const
     mp = new Module_Param_Hexstring_Template(pattern_value->n_elements, val_cpy);
     break; }
   case DECODE_MATCH:
-    mp->error("Referencing a decoded content matching template is not supported.");
+    TTCN_error("Referencing a decoded content matching template is not supported.");
     break;
   default:
+    TTCN_error("Referencing an uninitialized/unsupported hexstring template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Integer.cc b/core/Integer.cc
index 62648d86e1d1d51264bf1694230348be99cc2d41..9f937592b6f73031860bf0f5f866683f1e54a98c 100644
--- a/core/Integer.cc
+++ b/core/Integer.cc
@@ -2549,6 +2549,7 @@ Module_Param* INTEGER_template::get_param(Module_Param_Name& param_name) const
     mp = new Module_Param_IntRange(lower_bound, upper_bound, value_range.min_is_exclusive, value_range.max_is_exclusive);
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported integer template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Objid.cc b/core/Objid.cc
index 97ef19a21923e732af4da28c3006095bf96dbfcd..f1b58ad746657821414c467b7f24cc54058ed851 100644
--- a/core/Objid.cc
+++ b/core/Objid.cc
@@ -982,6 +982,7 @@ Module_Param* OBJID_template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported objid template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Octetstring.cc b/core/Octetstring.cc
index 03375184a3b3a85b1489fc60c53d68e4ac090fa4..62945fb1c6500789bf91c34713c322db40ad3f09 100644
--- a/core/Octetstring.cc
+++ b/core/Octetstring.cc
@@ -2154,9 +2154,10 @@ Module_Param* OCTETSTRING_template::get_param(Module_Param_Name& param_name) con
     mp = new Module_Param_Octetstring_Template(pattern_value->n_elements, val_cpy);
     break; }
   case DECODE_MATCH:
-    mp->error("Referencing a decoded content matching template is not supported.");
+    TTCN_error("Referencing a decoded content matching template is not supported.");
     break;
   default:
+    TTCN_error("Referencing an uninitialized/unsupported octetstring template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Template.cc b/core/Template.cc
index 5f3c5039d5f1d201d1333c51540b1d296f8e403c..75e1fc7b07e297b6f13590d2168a5efbb8cd9eee 100644
--- a/core/Template.cc
+++ b/core/Template.cc
@@ -1404,6 +1404,7 @@ Module_Param* Record_Of_Template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type %s.", get_descriptor()->name);
     break;
   }
   if (is_ifpresent) {
@@ -2290,6 +2291,7 @@ Module_Param* Set_Of_Template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type %s.", get_descriptor()->name);
     break;
   }
   if (is_ifpresent) {
@@ -2976,6 +2978,7 @@ Module_Param* Record_Template::get_param(Module_Param_Name& param_name) const
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type %s.", get_descriptor()->name);
     break;
   }
   if (is_ifpresent) {
@@ -3365,6 +3368,7 @@ Module_Param* Empty_Record_Template::get_param(Module_Param_Name& param_name) co
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported template of type %s.", get_descriptor()->name);
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Universal_charstring.cc b/core/Universal_charstring.cc
index a454844a0fbe8c3ea3c4dcefb2199119443c6c08..1803a8b3d8d25df13c5187d771f41a4c314dcf6a 100644
--- a/core/Universal_charstring.cc
+++ b/core/Universal_charstring.cc
@@ -4580,9 +4580,10 @@ Module_Param* UNIVERSAL_CHARSTRING_template::get_param(Module_Param_Name& param_
     mp = new Module_Param_Pattern(mcopystr(*pattern_string), pattern_value.nocase);
     break;
   case DECODE_MATCH:
-    mp->error("Referencing a decoded content matching template is not supported.");
+    TTCN_error("Referencing a decoded content matching template is not supported.");
     break;
   default:
+    TTCN_error("Referencing an uninitialized/unsupported universal charstring template.");
     break;
   }
   if (is_ifpresent) {
diff --git a/core/Verdicttype.cc b/core/Verdicttype.cc
index 86cbd1016202cf26faa852d95783e39a58f0027d..133ebd945c83b7e82efd9f2a75e59ba725864664 100644
--- a/core/Verdicttype.cc
+++ b/core/Verdicttype.cc
@@ -759,6 +759,7 @@ Module_Param* VERDICTTYPE_template::get_param(Module_Param_Name& param_name) con
     }
     break; }
   default:
+    TTCN_error("Referencing an uninitialized/unsupported verdict template.");
     break;
   }
   if (is_ifpresent) {